Comparative evaluation of three-phase isolated matrix-type PFC rectifier concepts for high efficiency 380VDC supplies of future telco and data centers

• Published in: 2014 16th European Conference on Power Electronics and Applications pp. 1 - 10
• Main Authors: Cortes, Patricio, Bortis, Dominik, Pittini, Riccardo, Kolar, Johann W.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.08.2014
• Subjects: DC power supply; Efficiency; Matrix converter; Matrix converters; Power distribution; Power factor correction; Power supply; Semiconductor diodes; Servers; Topology; Uninterruptible power systems; Voltage control
• DOI: 10.1109/EPE.2014.6910990

Due to the high energy consumption in data and telco centers, the use of 380V or 400V DC facility-level distribution has been proposed as an alternative to the conventional AC distribution for a more efficient power delivery structure. The DC voltage is powered from the three-phase mains by a PFC rectifier and in many cases a mains transformer is used to provide galvanic isolation. In order to achieve a high efficiency in the DC voltage generation and to implement the required isolation, a single-stage concept, such as a matrix-type rectifier that enables PFC functionality and galvanic isolation in a single conversion, can be beneficial. In addition, due to the fact that with the matrix-type rectifier the galvanic isolation is performed with a high-frequency transformer, this results in a more compact rectifier system compared to conventional systems where the mains-frequency isolation transformer is located at the input of the PFC rectifier. In this paper, an overview of isolated matrix-type PFC rectifier topologies is given and a new converter circuit is proposed, analyzed and comparatively evaluated against another promising PFC rectifier concept, the phase-modular IMY-rectifier.